.hidden {
    display: none;
}

.center {
    margin: auto;
   
    border: 3px solid lightgray;
    padding: 10px;
}
 .textarea-inherit {
	width: 100%;
	overflow: auto;
	word-break: break-all; //解决兼容问题
}
.centerBorderless {
    margin: auto;
    width: 75%;
    padding: 10px;
}

.centerImage{
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 100%;
}

.centerCanvasMedium {
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
width: 100%;
}

.centerCanvasLarge {
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
width: 100%;
}

textarea {
    display: block;
    margin-left: auto;
    margin-right: auto;
}